Robert b



fR. s. HoUsLEY. WASHOUT PLUG.

n APPLICATION FILED MAR-17,1919. 1,346,496. Patented July 13, 1920.

i UNITED STATES PATENT OFFICE. L

Bonner B. IIoUsLEY, or INDIANAPOLIS, INDIANA.

WAsHoU'r-PLUG. I

To*k all whom it may concern `Be it known that I, ROBERT B. HoUsIiEY,

` a citizen of the United States, residing at vention is topmake a Indianapolis,`in the county of Marion and State of Indianahave invented a new and useful Washout-Plug, of which the follow* ingis aspecification. o

This invention relates to plugs of the character employed in connection witliboilers and the like and an Object of the in-v plug which will ybe leak-proof. e

Another object is to provide a construction which will insure against crossing of thethreads of the cap and nipple members when the cap is being screwed onto ror into the nipple.

Another object is to provide guide means on the nipple and capL which will register with one another when placing the cap in f position for screwing on the nipple, so that the cap and nipple will be axially alined with one another and the threads of the cap will match up properly with the threads of the nipple in order that the cap vmay ybe readily screwed into place without injurying the threads of either member by crossing of the threads.

Other objects and advantages will appear` in the subjoined detailed description.

The accompanying drawings illustrate the invention: j

Figure 1 is a cap-cndview of a washout plug made in accordance with the provisions of this invention. j

Fig.2 is a side elevation of-Fig. 1.

Fig. v3 ,-is a vertical mid section on line indicated by .r3-m3, Fig. 1.y n

Fig. 4- is a plan section on line indicated by .fab-m4, Fig. 3. g

Fig. 5 is a vertical mid section analogous to Fig. 3 of a modified form of the invention.

Fig. 6 is a plansection by :aL-, Fig. 5. o

The washout plug comprises a nipple .1. and a cap 2, the nipple 1 being provided with screw-threads 3 for threading into the orice made to receive it in a boiler or other container. The nipple 1 is provided `in the end opposite the end having the screwthreads 3 with an annular groove or channel 4, the'outer wall 5 of said channel being provided with screw-threads 6 adapted to engage screw-threads e 7 on an annular flange 8 of the cap. The inner wall 9 of,

on line indicated Specification of Letters Patent.

the groove 4 is smooth on its outer peripheral face and may beslightly tapered outwardly, if desired, and said wall engages the inner face of the flange 8.

The inner wall 9 extends outward beyond the plane of theL outer end of the outer wall 5 so that when the cap is', applied to the nipple the flange 8 will first engage the outer end of the inner wall 9 to axially aline the cap and nipple with one another before the screw-threads 6, 7 come into engagement with one another. j

It is desirable to employ packing between the nipple 1 and cap 2 and said packing is in the form of an annulus 10 formed of any suitable packing material and interposed between the outer end of the wall 2 and the innerfaee of the cap so that whenthe cap is screwed up tightly the annulus will be compressed between the nipple and cap to prevent leakage through the joint therebetween. n y l The cap 2 may be provided with an internal wrench seat 11, as in Fig. 3, or may be provided with an external wrench seat 12, as in Fig.,5, according to the desire of the constructor. o

`Nowrreferring to the form of the invention shown in Figs. 1,2 and 3, and more particularly to Fig. 3, the cap 2 is provided with or forms an inwardly extending plug 13, there Vbeing thus formed an annular groove 14; kbetween the flange 8 and plug 13, and the inner wall 9 of the nipple being inserted in saidgroove. .The inner face of the wall 9 is adapted to engage the peripheral face of' vthe plug 13, since said plug fits the bore 15 0f the nipple, so asto aid in guiding the cap 2 into axial alinement with theinipple 1 when the cap 2 is applied to saidnipple, to prevent relative crossing of the screw-thre`ads 6, 7 when the cap is subsequently screwed home. Y

The plug 13 is at least as longas the flange 8 and in Fig. 3 is shown somewhat longer, and therefore the wall 9 and plug 13 `will first engage when the cap is being applied to the nipple. f

In applying the cap 2 shown in Fig. 5 to the nipple 1, it is clear that the first engagement between the cap and nipple will occur between the flange 8 and inner wall 9 and that, in order to bring the threaded portions 6, 7 close enough together to engage one another, the cap and nipple must first bein axial alinement with one another, since n y Patented July 13,1920. Application led March 17, 1919. Serial No. 283,115.`

otherwise the cap would bind on the nipple and not slide thereon suliioiently iar te pern'iit of said engagement ol" the screwthreads. This is the reason Yl'or the inner wall 9 being made to extend outward beyond the plane of the outer end of the outer wall 5, and thus the Vfla-.nge 8 and inner wall 9 constitute means to insure alining oi the cap and nipple axially when the cap is being assembled in place. These guiding means also occur in the fior-In oi? the invention shown in Figs. 1 to 3, and additional guiding means are afforded by the inner wall 9 and plug 13 since they come into engagement with one another before the threads 6, 7; and thus, in the form oil" the invention shown in Figs. 1 to 3, the cap can be axially alined with the nipple possibly even quicker than in the forni oit the invention shown in Fig. 5.

The invention is not liinited to the exact details of construction shown in the drawings and described above but embraces surh.

changes and modifications as may lie within the spirit and scope of the appended claims.

l claim:

1. A washout plug comprising a .nipple having an annular groove in one end, the outer wall oi the groove being provided with screw-threads and the inner wall of the groove projecting outward beyond the plane of the outer end of the outer wall of the groove7 and ai cap having a flange provided with screw-threads adapted to engage the screw-threads of' the nipple.

2. A washout plug comprising a nipple having an annular groove ink one end, the outer wall of the groove being provided with screw-threads and the inner wall of the groove projecting outward beyond the plane of the outer end of the outer wall of the groove, and a cap having a flange provided with screw-threads adapted to en' gage the screw-threads oit the nipple7 said cap having a plug adapted to lit in the bore oi" the nipple.

3. A washout plug comprising a nipple having an annular groove in one end, the outer wall of the groove being provided with screw-threads andthe inner wall of the groove projecting outward beyond the plane of the outer end of the outer wall of the groove, and a cap having a flange pro vided with screw-threads adapted to engage the screw-threads of the nipple, the cap having a plug to lit the bore of the nipple and the inner face oi' the flange being adapted to engage the outer face of the inner wall of the groove.

4;. A washout plug comprising a nipple having an annular groove in one end, the outer wall of the groove being provided with screw-threads and the inner wall of the groove projecting outward beyond the plane of the outer' end vof the outer wall of the groove, a cap having a flange provided with screw-threads adapted to engage the screwthreads of the nipple, and a packing annulus interposed between the outer end of the inner wall of the groove and the inner face of the cap. i

5. A washout plug comprising a nipple having an annular groove in one end, the outer wall of the groove being provided with serew-threads and the inner wall ol the groove projecting outward beyond the plane o't the outer end of the outer wall of the groove, a cap having a flange provided with .\-;c1e\vthreads adapted to engage the screwthreads of the nipple, said cap having a plug adapted to lit in the bore of the nipple, and a packing annulus surrounding the plug and interposed between the outer end oli the inner wall of the groove and the inner face of the cap.

(3. A. washout plug comprising a nipple having an annular groove in one end, the outer wall of the groove being provided 'with screwethreads and the inner wall of the groove projecting outward beyond the plane ol the outer end of the outer wall of the groove, a cap having a flange provided with screw-threads adapted to engage the screw-threads of the nipple, the cap having a plug to lit the bore of the nipple and the inner 'face of the flange being adapted to engage the outer face of the inner wall of the groove, and a j iacking annulus surrounding the' plug and interposed between the outer end of the inner' wall of the groove and the inner face of the cap.

Signed at Indianapolis, Indiana, this 6th day oi March, 1919.

ROBERT B. HOU SLEY.

fitnesses BYRON l". MoNsnn, NORA MAME REILLY. 

